I used it, even with a PC - it's weak as water. When I furst started detailing I bought the whole WG line and the hype that went with it. The only thing that was OK was the sealer - and that, my brother, is waaaay overpriced.
I have actually used that Pre-wax cleaner you gave me Bug, and it's pretty decent for a general cleaning and glossing for paint. Goes along with all my other 10000 polishes.
I am actually waiting on the Ultimate Detailing Machine trade in to see how close the UDM compares to the rotary. I actually have the ungainly heavy "Vector" rotary, and it's ok, but the makita would be soooo much better. I actually have about 2-3hrs of Rotary work ahead of me. I have to polish my paint to get out all the body shop holigrams and swirls. Fun fun fun.